CN108002594A - A kind of phosphorous aluminium and aluminium alloy anodized waste water treatment process - Google Patents
A kind of phosphorous aluminium and aluminium alloy anodized waste water treatment process Download PDFInfo
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- CN108002594A CN108002594A CN201711393901.1A CN201711393901A CN108002594A CN 108002594 A CN108002594 A CN 108002594A CN 201711393901 A CN201711393901 A CN 201711393901A CN 108002594 A CN108002594 A CN 108002594A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The invention discloses a kind of phosphorous aluminium and aluminium alloy anodized waste water treatment process, sludge quantity decrement ＞ 40%, accessory substance sludge yield is few, and the sludge sulfur content of generation is low, suitable for cement kiln synergic processing；Very complicated material proportion is not required in technology controlling and process, only need to control pH parameters；Different according to discharging modes after wastewater treatment is complete, the second pollutant content's index can stably reach《Sewage is discharged into town sewer water standard GB/T31962 2015》Standard or《Electroplate pollutant emission standard GB21900 2008》Two standard of table；Due to the presence of phosphate radical, all kinds of micro heavies can be combined to form insoluble phosphate by it in water, and a class of pollutant content's index can be with reaching《Electroplate pollutant emission standard GB21900 2008》Two standard of table.
Description
Technical field
The present invention relates to industrial waste water treatment, more particularly to a kind of phosphorous aluminium and aluminium alloy anode oxide to give up
Water treatment technology.
Background technology
Common alumilite process technique is as follows：Aluminum component-suspension member-alkaline degreasing-chemical polishing-anodic oxidation-dye
Color-sealing of hole-packaging-product
It is at present wherein in surface with chemical polishing technology to use " two acid " (phosphoric acid, sulfuric acid) glossings more ", wherein 50% above is
Phosphoric acid (phosphoric acid purity used in alumilite process technique is 85%, and the purity of sulfuric acid is 98%, is mass concentration).It is domestic at present
Producer processing when, waste water is usually divided into phosphorous comprehensive wastewater and nickel-containing waste water and is handled respectively, classical processing method is such as
Under：
The nickel-containing waste water that hole-sealing technology produces is to be adjusted pH to more than 10 by adding sodium hydroxide, and nickel ion is converted
Remove from waste water for nickel hydroxide precipitate, then can directly be discharged after acid adding readjustment pH ＜ 9.
Phosphorous comprehensive wastewater generally using oxidation calcium precipitation method or calcium oxide-sodium hydroxide pellets method, passes through calcium ion
Insoluble calcium salt is combined to form with phosphate radical to remove total phosphorus.But due to containing a large amount of sulfate radicals, meeting and calcium ion in waste water
With reference to calcium sulfate precipitation is produced, a large amount of accessory substance sludge are produced.
Before in Augusts, 2016, the sludge that alumilite process wastewater treatment produces is general solid waste in addition to sludge containing heavy metal.
On August 1st, 2016, country has implemented new edition《National Hazard waste register》, the dirt that produces in all surface processing wastewater treatment
Mud is hazardous waste, greatly improves the expense of sludge treatment, and the economy of above-mentioned treatment process is greatly reduced.
In addition, also having been reported that the total phosphorus added in molysite removal comprehensive wastewater, sludge yield can be reduced, but add
The technique of molysite, which has the disadvantage that, causes no widespread adoption.
1st, reagent cost is high：Need to add a large amount of molysite, sodium hydroxide；
2nd, technological requirement is high：The strictly ratio of control iron and phosphorus is needed, it is difficult to reach in practical operation；
3rd, difficulty up to standard：Cannot be directly up to standard by wastewater treatment by this kind of technique.
So seek a kind of economy higher aluminium and aluminium alloy anode oxide treatment of Phosphorus Containing Waste Water technique it is extremely urgent.
The content of the invention
To solve deficiency of the prior art, the object of the present invention is to provide a kind of phosphorous aluminium and aluminium alloy anode oxide
Waste water treatment process, it is intended to solve that the sludge quantity for the treatment of process generation is big, and amount of by-products is more, material proportion is complicated, of high cost, gives up
The problem of shipwreck is up to standard.
To achieve the above object, the technical scheme is that：At a kind of phosphorous aluminium and aluminium alloy anodized waste water
Science and engineering skill, comprises the following steps：
Step (1)：First order neutralization reaction；The MgO/Mg (OH) of configuration quality content 5-10%2Slurries are simultaneously added to aluminium
And in aluminium alloy anode oxide high phosphorus waste water, wastewater pH is adjusted to 5.5-6.5；
The high phosphorus Phosphorus From Wastewater content ＞ 3000mg/L；
Step (2)：Flocculation precipitation；Waste water gross weight millesimal poly- third is added into the waste water mixed up through step (1)
Separation of solid and liquid obtains low-phosphorous waste water after acrylamide carries out flocculation precipitation；
The low-phosphorous Phosphorus From Wastewater content ＜ 1000mg/L.
Further, step (3) is further included：Second level neutralization reaction；Prepare the MgO/Mg (OH) of mass content 4-8%2
With 1-2%CaO/Ca (OH)2Mixed serum, and mixed serum is added into the low-phosphorous waste water that is obtained through step (2) or this is low-phosphorous
Waste water is with the composite waste of the waste water of other phosphorus contents ＜ 1000mg/L, adjusting wastewater pH and being adjusted to 8.5-9.0；
Step (4)：Secondary flocculation precipitation；It is millesimal that waste water gross weight is added into the waste water mixed up through step (3)
Polyacrylamide carries out separation of solid and liquid after flocculation precipitation；Waste water is obtained to meet《Sewage is discharged into town sewer water standard GB/
T31962-2015》。
Further, step (5) is further included：Third level neutralization reaction；CaO/ is added into the waste water obtained through step (4)
Ca(OH)2Slurries, adjust wastewater pH and are more than 10.0；The millesimal polyacrylamide of waste water gross weight is then added, flocks are sunk
Separation of solid and liquid is carried out behind shallow lake, clear liquid acid adding pulls back to pH less than 9.0；Waste water is obtained to meet《Electroplate pollutant emission standard
GB21900-2008》Two standard of table.
Further, it is further comprising the steps of：The precipitation obtained to step (2), (4), (5) carries out press filtration, and filtrate returns
In clear liquid obtained by this step.
Preferably, MgO/Mg (OH) in the step (3)2With CaO/Ca (OH)2Ratio is 4:1.
Reaction mechanism
First order neutralization reaction is to add MgO/Mg (OH)2After slurries, pH is adjusted to 5.5-6.5, the key reaction of generation
It is as follows：
(n is according to temperature
Difference, is 3 or 7)
Second level neutralization reaction is to add MgO/Mg (OH)2With CaO/Ca (OH)24:1 mixed serum, pH is adjusted to
8.5-9.0 the key reaction of generation is as follows：
(n is different according to temperature, is 8 or 22)
As waste water is directly discharged into water body, third level neutralization reaction need to be carried out, total phosphorus content is continued to reduce.The third level neutralizes
Reaction is to add CaO/Ca (OH)2Slurries, are adjusted to be more than 10 (subsequently needing acid adding to pull back to pH less than 9) by pH, generation it is main
Reaction is as follows：
Most of phosphorus is converted into MgHPO by first order neutralization reaction4Hydrate deposition is removed from waste water, and phosphoric residue is useless
With HPO in water4 2—Form exists, and total phosphorus content is about in 300~1000mg/L.Second level neutralization reaction is by HPO4 2—It is converted into
Mg3(PO4)2Hydrate deposition is removed from waste water, total phosphorus content ＜ 8mg/L after the second order reaction, can be reached and is discharged into city dirt
Waterpipe performs《Sewage is discharged into town sewer water standard GB/T31962-2015》.Add mixed slurry purpose be due to
MgO/Mg(OH)2React in alkaline conditions relatively slowly, add CaO/Ca (OH)2Reaction rate can be lifted.The third level neutralizes
CaO/Ca (OH) is only added in reaction2, it is due to Ca3(PO4)2Solubility product constant be less than Mg3(PO4)2, it is ensured that total phosphorus refers to
Mark is less than 1.0mg/L, reaches《Electroplate pollutant emission standard GB21900-2008》Two standard of table.Due to CaO/Ca in technique
(OH)2Addition very little, only a small amount of CaSO4Accessory substance produces.
Beneficial effects of the present invention：Sludge quantity decrement ＞ 40%, accessory substance sludge yield is few, the sludge sulfur-bearing of generation
Measure it is low, suitable for cement kiln synergic processing；
Very complicated material proportion is not required in technology controlling and process, only need to control pH parameters；
Different according to discharging modes after wastewater treatment is complete, the second pollutant content's index can stably reach《Sewage is arranged
Enter town sewer water standard GB/T31962-2015》Standard or《Electroplate pollutant emission standard GB21900-2008》Table two
Standard；
Due to the presence of phosphate radical, all kinds of micro heavies can be combined to form insoluble phosphate by it in water, a kind of
Pollutant load index can be with reaching《Electroplate pollutant emission standard GB21900-2008》Two standard of table.
Brief description of the drawings
Fig. 1 is the process flow chart of the embodiment of the present invention 1
Fig. 2 is the process flow chart of the embodiment of the present invention 2.
Embodiment
Embodiment 1
Enterprise's anode oxidation process is measured with acid：Phosphoric acid (85%) 15-20t/m sulfuric acid (98%) 15-20t/m, phosphoric acid and sulphur
Sour use quality ratio is 1:1.
Waste water yield：It is high phosphorus waste water (surface with chemical polishing technology generation) 20-30m by the further sub-prime of comprehensive wastewater3/d
With low-phosphorous waste water (generation of other techniques) 50-70m3/ d, amounts to 70-100m3/d。
Influent waste water water quality (unit：It is mg/L in addition to pH) as shown in table 1：
Table 1
Discharge of wastewater mode：It is discharged into town sewage pipeline.
Original treatment process is lime precipitation technique, and feeding lime in waste water is reconciled pH to 8-9, it is useless by what is reconciled
Water squeezes into mudpan, and bed mud is periodically into filter press press filtration, and filtrate enters discharge pond with upper strata clear water, by being pumped into city
Sewage conduct；Sludge yield after press filtration is 150-160t/m.
Using wastewater treatment process after present invention process：
As shown in Figure 1：High phosphorus waste water enters high phosphorus wastewater collection pond with low-phosphorous waste water to workshop gravity flow and is received with low-phosphorous waste water
Ji Chi.High phosphorus waste water is lifted into the first order and successive reaction pond by pumping, while adds the mass content 8% configured
MgO slurries, control reaction tank water outlet pH5.5-6.5.Water outlet enters flocks reaction tank 1, and polyacrylamide is added in pond.Flocks
Afterwards, muddy water is mixed into first stage precipitation tank and carries out separation of removing contamination, and bed mud is periodically pumped into 1 press filtration of filter press, and filtrate is precipitated with level-one
Pond supernatant liquor mixing is discharged into low-phosphorous wastewater collection pond.
The mixing water of low-phosphorous waste water and first order neutralization reaction water outlet is lifted into the second level and successive reaction pond by pumping,
The mixed serum of the MgO of mass content 6.4% and the CaO of mass content 1.6%, control reaction tank water outlet pH are added at the same time
8.5-9.0, water outlet enter flocks reaction tank 2, after adding polyacrylamide flocks, into second-level settling pond.Sedimentation basin bed mud is determined
Phase is pumped into 2 press filtration of filter press, and filtrate is discharged into discharge pond after being mixed with second-level settling pond supernatant, discharge pond waste water is by being pumped into city
City's sewage conduct；After all sludge is collected, commission has qualification unit to be disposed.
It is as shown in table 2 to put water quality index (being mg/L in addition to pH) for wastewater treatment heel row after adopting new technology：
| Water quality index | pH | CODCr | SS | Total phosphorus | Ammonia nitrogen | Total nitrogen | Total nickel | Total chromium |
| 8.5~9.0 | ＜ 150 | ＜ 50 | ＜ 8 | ＜ 20 | ＜ 40 | ＜ 0.2 | ＜ 0.8 |
Table 2
Sludge yield：80~90t/m.
Embodiment 2
Enterprise's anode oxidation process is measured with acid：Phosphoric acid (85%) 8-10t/m sulfuric acid (98%) 12-15t/m, phosphoric acid and sulfuric acid
Use quality ratio is 2:3.
Waste water yield：Comprehensive wastewater 40-60m3/d。
Influent waste water water quality (unit：It is mg/L in addition to pH) as shown in table 3：
| Water quality index | pH | CODCr | SS | Total phosphorus | Ammonia nitrogen | Total nitrogen | Total nickel | Total chromium |
| Comprehensive wastewater | 1~2 | ＜ 100 | ＜ 200 | 3000-4500 | ＜ 15 | ＜ 20 | ＜ 0.5 | ＜ 1 |
Table 3
Discharge of wastewater mode：Handle it is up to standard after be directly discharged into nearby water body.
Original treatment process is lime-NaOH depositing technologies, feeding lime in waste water is reconciled pH to 7 or so, then
10%NaOH solution is added, after adjusting pH more than 10, the waste water reconciled is squeezed into mudpan, bed mud is periodically into press filtration
Machine press filtration, filtrate enter readjustment pond with upper strata clear water, adjust back in pond and add 5%HCl, pH is pulled back to less than 9, adjust back pond water outlet
Into discharge pond, by pumping to neighbouring discharge into water；Sludge yield is 80-100t/m.
Using wastewater treatment process after present invention process：
As shown in Figure 2：Phosphorous comprehensive wastewater to workshop gravity flow enters collecting pit.Comprehensive wastewater is lifted into the first order by pumping
Successive reaction pond is neutralized, while adds the MgO slurries of the mass content 5% configured, control reaction tank water outlet pH 5.5-6.5.
Water outlet enters flocks reaction tank 1, and polyacrylamide is added in pond.After flocks, muddy water is mixed into first stage precipitation tank and carries out clearly
Dirt separation, bed mud are periodically pumped into 1 press filtration of filter press, and filtrate mixes with first stage precipitation tank supernatant liquor is discharged into low-phosphorous waste water transfer receipts
Ji Chi.
Low-phosphorous waste water is lifted into the second level and successive reaction pond by pumping in collecting pit, while adds mass content 4%
MgO and mass content 1% CaO mixed serum, control reaction tank water outlet pH 8.5-9.0, water outlet enters flocks reaction tank
2, after adding polyacrylamide flocks, into second-level settling pond.Sedimentation basin bed mud is periodically pumped into 2 press filtration of filter press, filtrate and two
Transfer collection pond up to standard is discharged into after the supernatant mixing of level sedimentation basin, waits follow-up processing up to standard.
Waste water is lifted into the third level and successive reaction pond by pumping in transfer collection pond up to standard, while adds mass content
5% CaO slurries, adjust pH and are more than 10, water outlet enters flocks reaction tank 3, after adding polyacrylamide flocks, sinks into three-level
Shallow lake pond.Sedimentation basin bed mud is periodically pumped into 3 press filtration of filter press, and filtrate enters readjustment pond after being mixed with three-level sedimentation basin supernatant.Together
When adjust back pond in add prepared 5%HCl solution, pH is adjusted to 6~9.Waste water after adjusting back pond by entering discharge pond, row
Pond waste water is put by being pumped into water body nearby；After all sludge is collected, commission has qualification unit to be disposed.
It is as shown in table 4 to put water quality index (being mg/L in addition to pH) for wastewater treatment heel row after adopting new technology：
| Water quality index | pH | CODCr | SS | Total phosphorus | Ammonia nitrogen | Total nitrogen | Total nickel | Total chromium |
| 6~9 | ＜ 80 | ＜ 50 | ＜ 1 | ＜ 15 | ＜ 20 | ＜ 0.2 | ＜ 0.8 |
Table 4
Sludge yield：35~45t/m.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modification, equivalent substitution or improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of phosphorous aluminium and aluminium alloy anodized waste water treatment process, it is characterised in that comprise the following steps：
Step (1)：First order neutralization reaction；The MgO/Mg (OH) of configuration quality content 5-10%2Slurries are simultaneously added to phosphorous aluminium
And in aluminium alloy anode oxide high phosphorus waste water, wastewater pH is adjusted to 5.5-6.5；
The high phosphorus Phosphorus From Wastewater content ＞ 3000mg/L；
Step (2)：Flocculation precipitation；The millesimal polyacrylamide of waste water gross weight is added into the waste water mixed up through step (1)
Separation of solid and liquid obtains low-phosphorous waste water after amine carries out flocculation precipitation；
The low-phosphorous Phosphorus From Wastewater content ＜ 1000mg/L.
2. a kind of phosphorous aluminium and aluminium alloy anodized waste water treatment process according to claim 1, it is characterised in that also
Including step (3)：Second level neutralization reaction；Prepare the MgO/Mg (OH) of mass content 4-8%2With 1-2%CaO/Ca (OH)2's
Mixed serum, and mixed serum is added into the low-phosphorous waste water obtained through step (2) or the low-phosphorous waste water and other phosphorus contents ＜
In the composite waste of the waste water of 1000mg/L, adjust wastewater pH and be adjusted to 8.5-9.0；
Step (4)：Secondary flocculation precipitation；Waste water gross weight millesimal poly- third is added into the waste water mixed up through step (3)
Acrylamide carries out separation of solid and liquid after flocculation precipitation；Waste water is obtained to meet《Sewage is discharged into town sewer water standard GB/
T31962-2015》。
3. a kind of phosphorous aluminium and aluminium alloy anodized waste water treatment process according to claim 2, it is characterised in that also
Including step (5)：Third level neutralization reaction；CaO/Ca (OH) is added into the waste water obtained through step (4)2Slurries, are adjusted useless
Water pH is more than 10.0；The millesimal polyacrylamide of waste water gross weight is then added, carries out separation of solid and liquid after flocculation precipitation, clearly
Liquid acid adding pulls back to pH less than 9.0；Waste water is obtained to meet《Electroplate pollutant emission standard GB21900-2008》Two standard of table.
4. according to a kind of phosphorous aluminium of claim 1 or 2 or 3 and aluminium alloy anodized waste water treatment process, its feature
It is, it is further comprising the steps of：The precipitation obtained to step (2), (4), (5) carries out press filtration, and filtrate returns clear obtained by this step
In liquid.
5. a kind of phosphorous aluminium and aluminium alloy anodized waste water treatment process according to claim 2, it is characterised in that institute
State MgO/Mg (OH) in step (3)2With CaO/Ca (OH)2Ratio is 4：1.
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| CN201711393901.1A CN108002594A (en) | 2017-12-21 | 2017-12-21 | A kind of phosphorous aluminium and aluminium alloy anodized waste water treatment process |
| CN201810580625.8A CN108862531A (en) | 2017-12-21 | 2018-06-07 | A kind of polishing waste water treatment process of phosphoric acid, two acid of sulfuric acid |
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| CN201711393901.1A CN108002594A (en) | 2017-12-21 | 2017-12-21 | A kind of phosphorous aluminium and aluminium alloy anodized waste water treatment process |
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| CN201810580625.8A Pending CN108862531A (en) | 2017-12-21 | 2018-06-07 | A kind of polishing waste water treatment process of phosphoric acid, two acid of sulfuric acid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862531A (en) * | 2017-12-21 | 2018-11-23 | 杭州秀澈环保科技有限公司 | A kind of polishing waste water treatment process of phosphoric acid, two acid of sulfuric acid |
| CN112079484A (en) * | 2020-09-08 | 2020-12-15 | 池州市安安新材科技有限公司 | Treatment method of aluminum alloy anodic oxidation industrial wastewater |
| CN112744960A (en) * | 2021-03-02 | 2021-05-04 | 上海玉畔环保科技有限公司 | Pretreatment system and method for aluminum and aluminum alloy anodic oxidation phosphorus-containing wastewater |
| CN113697990A (en) * | 2021-08-24 | 2021-11-26 | 厦门科霖达环保科技有限公司 | Quality-divided flow treatment process for aluminum anodic oxidation wastewater |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110921914B (en) * | 2019-12-16 | 2022-03-25 | 杭州永洁达净化科技有限公司 | Sludge reduction treatment process and system for mixed acid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4224261B2 (en) * | 2002-07-05 | 2009-02-12 | 日本ケミコン株式会社 | Method for treating waste acid containing aluminum ions |
| CN107176712A (en) * | 2017-05-24 | 2017-09-19 | 宁波东钱湖旅游度假区焦式环保科技有限公司 | The method and apparatus of alumina wastewater treatment |
| CN108002594A (en) * | 2017-12-21 | 2018-05-08 | 杭州秀澈环保科技有限公司 | A kind of phosphorous aluminium and aluminium alloy anodized waste water treatment process |
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- 2017-12-21 CN CN201711393901.1A patent/CN108002594A/en active Pending
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862531A (en) * | 2017-12-21 | 2018-11-23 | 杭州秀澈环保科技有限公司 | A kind of polishing waste water treatment process of phosphoric acid, two acid of sulfuric acid |
| CN112079484A (en) * | 2020-09-08 | 2020-12-15 | 池州市安安新材科技有限公司 | Treatment method of aluminum alloy anodic oxidation industrial wastewater |
| CN112744960A (en) * | 2021-03-02 | 2021-05-04 | 上海玉畔环保科技有限公司 | Pretreatment system and method for aluminum and aluminum alloy anodic oxidation phosphorus-containing wastewater |
| CN113697990A (en) * | 2021-08-24 | 2021-11-26 | 厦门科霖达环保科技有限公司 | Quality-divided flow treatment process for aluminum anodic oxidation wastewater |
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Application publication date: 20180508 |